Published in Data Trekking·Nov 20, 2019Setting limits on ggplotIf you want to plot a chart with a few outliers in ggplot, you might be temped to use ylim. The problem with ylim is that it removes the data points that go beyond the limits. For instance, if you have the following data: data <- data.frame(x = 1:20, y…Data Science2 min readData Science2 min read
Published in Data Trekking·Apr 13, 2019Creating Time Maps in RTime Maps are a great way to understand events that happen with a certain cadence over time. Take a look at this article by Mark Watson for an excellent explanation on what they are and when they can be useful. The end result of this article will be to create…Data Science3 min readData Science3 min read
Published in Data Trekking·Feb 15, 2019Testing Rmd files on Shiny with monitWe are using monit to make sure our Shiny Server is running properly. We also want to make sure our applications and reports aren’t broken. Testing “normal” Shiny applications can be achieved with check host, but Rmd files are trickier... …Shiny Server2 min readShiny Server2 min read
Published in Data Trekking·Feb 11, 2019Monitoring a Shiny Server with MonitMy team uses a Shiny Server to share some data analysis and dashboards with other teams. The server has automatic processes to get data from external sources, and any team member can publish new code to production at any time. Most of the time things go right, but I want…Data Science3 min readData Science3 min read
Published in OutSystems Engineering·Mar 19, 2018A/B Testing OutSystems Mobile Apps with Google OptimizeThe goal is simple. I have a mobile application built with OutSystems and I want to check whether a red button or a green button converts better. The application has two screens and looks like this:Google Analytics4 min readGoogle Analytics4 min read
Feb 1, 2018A great place to workWhen looking for a new job, it’s easy to be impressed with the perks some companies offer. After all, working in a place that offers ping-pong tables, unlimited vacations, and free breakfast seems like fun! But perks are just ingredients. You’re not tasting the full dish! As discussed in this…Workplace2 min readWorkplace2 min read
Jan 10, 2018Your best option? Delay the projectPeople will quickly forget that a project was delivered late… But a project delivered with poor quality will leave a long-lasting memory! A few years ago I was platform release manager at OutSystems. My main responsibility was making sure we released versions of the platform on time. And that’s what…Product Management2 min readProduct Management2 min read
Aug 18, 2017This post was written on a typewriterYes, it is true. We’re in the middle of 2017 and I’m using a l935 typewriter to create a post. Don’t believe me? Check the image! …Writing2 min readWriting2 min read
Published in Arduino Playground·Mar 5, 2017Using a 74HC595 to control a LED MatrixSetting up a LED Matrix can quickly get you out of pins to do other things with your Arduino. One way to overcome this is to use a 74HC595 shift register. This chip transforms bits that are inserted in series trough the data pin into 8 parallel bits. …Arduino3 min readArduino3 min read
Published in Arduino Playground·Mar 1, 2017Using a LED matrix with ArduinoGot an 8x8 LED matrix such as the LBT2088AH that you want to connect to your Arduino? Here’s how it works:Arduino4 min readArduino4 min read
